Climate averages 1991–2020
Serang weather
in December.
A hot, very wet month: the 11th warmest and the 10th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
December is a hot month in Serang: daytime highs average 28.7°C and nights cool to about 24.2°C. By daytime temperature it is the 11th warmest of the 12 months.
Expect about 256 mm of rain on roughly 26 days, which makes December a very wet month (the 10th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 28 min on an average December day.
The nearest other city in this atlas is Cilegon (16 km away). In December its highs average 28.3°C, about as warm as Serang, with 293 mm of rain.
Among the 200 cities listed in Indonesia, Serang ranks joint 101st of 200 for the warmest December highs and joint 22nd of 200 for the driest December (rainfall, lowest first). The mean December high of those 200 cities is 28.4°C; Serang is 0.3°C warmer than that mean.
From December to January, average highs fall by 0.1°C to 28.6°C, and monthly rainfall rises from 256 mm to 278 mm.
The annual picture
December in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Serang climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 28.6°C24.1°C | 24.1°C | 278 | 28.3 | 12.412 h |
| February | 28.8°C24.1°C | 24.1°C | 257 | 26.5 | 12.312 h |
| March | 29.2°C24.3°C | 24.3°C | 236 | 27.5 | 12.112 h |
| April | 29.5°C24.4°C | 24.4°C | 190 | 25.5 | 12.012 h |
| May | 29.7°C24.2°C | 24.2°C | 133 | 21.6 | 11.812 h |
| June | 29.6°C23.8°C | 23.8°C | 100 | 17.6 | 11.812 h |
| July | 29.5°C23.4°C | 23.4°C | 73 | 15.0 | 11.812 h |
| August | 30.1°C23.5°C | 23.5°C | 50 | 12.8 | 11.912 h |
| September | 30.9°C23.8°C | 23.8°C | 62 | 14.2 | 12.112 h |
| October | 30.9°C24.3°C | 24.3°C | 119 | 20.7 | 12.212 h |
| November | 29.8°C24.4°C | 24.4°C | 192 | 25.8 | 12.412 h |
| December, selected | 28.7°C24.2°C | 24.2°C | 256 | 26.3 | 12.512 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
December in nearby cities
- Cilegon in DecemberIndonesia · 16 kmHigh 28.3°C · Low 24.5°C · 293 mm rain
- Pandeglang in DecemberIndonesia · 22 kmHigh 27.7°C · Low 22.8°C · 365 mm rain
- Kresek in DecemberIndonesia · 25 kmHigh 29.1°C · Low 24.0°C · 275 mm rain
- Rangkasbitung in DecemberIndonesia · 29 kmHigh 28.8°C · Low 23.3°C · 300 mm rain
- Pasarkemis in DecemberIndonesia · 42 kmHigh 29.0°C · Low 23.4°C · 275 mm rain
- Curug in DecemberIndonesia · 48 kmHigh 29.3°C · Low 23.0°C · 275 mm rain
- Tangerang in DecemberIndonesia · 53 kmHigh 29.2°C · Low 23.4°C · 264 mm rain
- Teluknaga in DecemberIndonesia · 54 kmHigh 29.5°C · Low 24.0°C · 234 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Serang) is explained once on the Serang year overview and on the Sources, method and limits page.